72168116 has 6 divisors (see below), whose sum is σ = 126294210. Its totient is φ = 36084056.

The previous prime is 72168091. The next prime is 72168121. The reversal of 72168116 is 61186127.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 36120100 + 36048016 = 6010^2 + 6004^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9021011 + ... + 9021018.

It is an arithmetic number, because the mean of its divisors is an integer number (21049035).

Almost surely, 2^72168116 is an apocalyptic number.

It is an amenable number.

72168116 is a deficient number, since it is larger than the sum of its proper divisors (54126094).

72168116 is a wasteful number, since it uses less digits than its factorization.

72168116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18042033 (or 18042031 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 72168116 is about 8495.1819285993. The cubic root of 72168116 is about 416.3403049358.

The spelling of 72168116 in words is "seventy-two million, one hundred sixty-eight thousand, one hundred sixteen".